An Intelligent AIEgen with Nonmonotonic Multiresponses to Multistimuli,Advanced Science

当前位置： X-MOL 学术 › Adv. Sci. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

An Intelligent AIEgen with Nonmonotonic Multiresponses to Multistimuli
Advanced Science ( IF 14.3 ) Pub Date : 2020-09-06 , DOI: 10.1002/advs.202001845
Yujie Tu _{1,

2} , Yeqing Yu ₁ , Diwen Xiao ₃ , Junkai Liu _{1,

2} , Zheng Zhao _{1,

2} , Zhiyang Liu _{1,

2} , Jacky W Y Lam _{1,

2} , Ben Zhong Tang _{1,

2,

4}

Affiliation

Intelligent stimulus–response (S/R) systems are the basis of natural process and machine control, which are intensively explored in biomimetic design and analytical/biological applications. However, nonmonotonic multi‐S/R systems are still rarely studied so far. In this work, a rational design strategy is proposed to achieve such a unique S/R system by integrating opposite luminescence behaviors in one molecule. When solvent polarity increases, many heterocyclic or carbonyl‐containing compounds often become more emissive due to the suppression of the proximity effect, whereas molecules with donor–acceptor (D–A) structures tend to be less emissive because of the twisted intramolecular charge transfer. Meanwhile, protonation on D/A moieties will weaken/strengthen the D–A interaction to result in blue/redshifted emissions. By combining a protonatable heterocyclic acceptor and a protonatable donor together in one molecule, nonmonotonic brightness responses to polarity stimuli and nonmonotonic color responses to pH stimuli can be achieved. The design strategy is successfully verified by a simple molecule named 4‐(dimethylamino)styryl)quinoxalin‐2(1H)‐one (ASQ). ASQ exhibits nonmonotonic responses to polarity and pH stimuli, and aggregation‐induced emission (AIE) with a nonmonotonic AIE curve. Meanwhile, ASQ can be adjusted to emit white light in an acidic environment, and it shows multivalent functionalities including albumin protein sensing, ratiometric pH sensing, and amine gas sensing.

中文翻译：

对多重刺激具有非单调多重响应的智能 AIEgen

智能刺激-响应（S/R）系统是自然过程和机器控制的基础，在仿生设计和分析/生物应用中得到深入探索。然而，迄今为止，非单调多S/R系统的研究仍然很少。在这项工作中，提出了一种合理的设计策略，通过在一个分子中集成相反的发光行为来实现这种独特的 S/R 系统。当溶剂极性增加时，由于邻近效应的抑制，许多杂环或含羰基化合物往往变得更加发射，而具有供体-受体（D-A）结构的分子由于扭曲的分子内电荷转移而往往发射性较低。同时，D/A 部分上的质子化将削弱/加强 D-A 相互作用，从而导致蓝移/红移发射。通过将可质子化杂环受体和可质子化供体结合在一个分子中，可以实现对极性刺激的非单调亮度响应和对pH刺激的非单调颜色响应。该设计策略已通过名为 4-(二甲氨基)苯乙烯基)喹喔啉-2(1 H )-酮 (ASQ) 的简单分子成功验证。 ASQ 对极性和 pH 刺激表现出非单调响应，并具有非单调 AIE 曲线的聚集诱导发射 (AIE)。同时，ASQ可以在酸性环境下调节发射白光，并表现出多价功能，包括白蛋白传感、比率pH传感和胺气体传感。

更新日期：2020-10-22

点击分享查看原文

点击收藏

公开下载

阅读更多本刊最新论文本刊介绍/投稿指南11